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1
Content available remote Investigation of the Influence of Technology Parameters and Thread Type on Embroidered Textile Element Quality
Daukantienė Virginija, Mikelionytė Karolina
Autex Research Journal
|
2020
|
Vol. 20, no. 4
517--523
EN
Embroidery can be applied to improve esthetic or functional properties of products. However, the expected appearance of the original design may be discarded by unsuitable selected technological parameters of embroidery machine. Thus, the influence of the technological parameters and embroidery thread types on the embroidery geometric parameters and on tension characteristics of embroidery has been investigated in this research. The research results revealed that the changes in geometry parameters of the designed digital image compared with the ones of actual embroidery samples are dependent on embroidery filling type, stitch density, and thread type. Mechanical testing of the embroidery elements has proved that embroidering influences the decrease in material breaking force and elongation at break compared with their initial tension characteristics.
2
Content available remote Introducing a Newly Developed Fabric for Air Filtration
Hakam Mohamed, Hashima Wael, Elhawary Ibrahim, Elgeiheini Adel
Autex Research Journal
|
2020
|
Vol. 20, no. 2
148--154
EN
Woven and nonwoven fabrics present filtration efficiency higher than other air filtration media. Fabrics are selected according to air flow conditions and particle characteristics. The majority of air filtration media are nonwoven fabrics because of their cost, but they need high filtration area for high efficiency. Modified construction of woven fabric introduces high performance in air filtration and decreases filter size, which tends to have better competition abilities. The designed fabrics have considerable thickness and suitable pore characteristics by applying roving instead of weft yarns. Four factors (roving count and their turns per inch, picks per inch and fabric designs) were varied in order to study the effect of these factors on their performance in filtration. Optimum operating conditions for a determined range of air permeability and pore size were obtained.
3
Content available remote The Use of Fabrics to Improve the Acoustic Absorption: Influence of the Woven Fabric Thread Density Over a Nonwoven
Segura-Alcaraz P., Segura-Alcaraz J., Montava I., Bonet-Aracil M.
Autex Research Journal
|
2018
|
Vol. 18, no. 3
269--280
EN
Noise is frequently unnoticed, but it is one of the causes of unhealth for human beings reducing people’s quality of life. There are many materials that can be considered as acoustic absorbents. Textiles can be used to both improve the acoustic quality of and to decorate the room where they have been placed. In this study, we used some fabrics with 15, 20 and 30 ends/cm and 15, 20 and 30 picks/cm. The acoustic absorption coefficient was measured when the fabric was added as a resistive layer on top of a nonwoven made of polyester fiber. Results evidence that these fabrics can be efficiently used to modify the acoustic absorption of the nonwoven. Sound absorption coefficients measured via the impedance tube method show that these modifications occur. The results show how it is possible to improve the acoustic characteristics of a simple nonwoven to obtain sound absorption coefficients close to values of 1 at different frequencies by choosing a fabric with the appropriate combination of warp and weft count.
4
Content available remote Analysis Possibilities of Controlled Transport of Moisture in Woven Fabrics
Sirková B., Moučková E.
Autex Research Journal
|
2018
|
Vol. 18, no. 4
385--391
EN
The article is focused on testing of selected properties of linear and planar textiles from modified cotton yarns. In this article, the influence of woven fabric construction on wettability and possibilities of detection of moisture in the woven fabric is analyzed. Improving the physiological and hygienic properties for woven fabrics can be achieved with a specially designed textile structure in combination with a permanent surface finish of sub-set of yarns. Inserting of hydrophilic and hydrophobic set of threads in the woven structure makes possible controlled water transport. Controlled transport of water ensures good clothing comfort. Using such woven fabric, accumulation of water on the skin does not occur during the process of thermoregulation of the human body. The properties and behavior of the designed fabric will be determined by surface finishing of the warp and weft yarns (sub-set of yarns), which are supporting elements of the fabric.
5
Content available Strategie niskopoziomowego programowania współbieżnego platformy .NET
Wichary P., Jóźwiak I., Szczepanik M.
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
|
2017
|
z. 113
517--527
PL
W artykule przedstawiono mechanizmy związane z programowaniem współbieżnym na niskim poziomie abstrakcji. Na podstawie literatury światowej wyróżniono zbiór pojęć podstawowych dotyczących współbieżności. Wskazano mechanizmy pomagające w rozwiązaniu problemu wzajemnego wykluczania przy użyciu konstrukcji językowych platformy .NET. Opisano sposoby uzyskania synchronizacji wątków wraz z opisem ich wad i zalet.
EN
The article presents issues related to low level concurrent programming. Based on world literature, a collection of basic notions of concurrency has been distinguished. Indicators that help to solve the mutual exclusion problem using the .NET language constructs. Describes ways to get thread synchronization once with a description of their drawbacks and advantages.
6
Content available Web server latency reduction study
Mbarek F., Mosorov V., Wojciechowski R.
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
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2017
|
T. 7, nr 2
19--23
EN
This paper investigates the characteristics of web server response delay in order to understand and analyze the optimization techniques of reducing latency. The analysis of the latency behavior for multi-process Apache HTTP server with different thread count and various workloads, was made. It was indicated, that the insufficient number of threads used by the server handling the concurrent requests of clients, is responsible for increasing latency under various loads. The problem can be solved by using a modified web server configuration allowing to reduce the response time.
PL
W artykule opisano badania charakterystyk czasowych serwera WWW w celu zrozumienia i analizy technik optymalizacyjnych powodujących redukcję opóźnienia. Dokonano analizy czasów opóźnień dla wieloprocesowego serwera Apache dla różnej liczby wątków i obciążeń. Wskazano, że niewystarczająca liczba wątków wykorzystywanych przez serwer, obsługujących jednoczesne żądania klientów, wpływa znacząco na zwiększenie opóźnień dla różnych obciążeń. Problem może być rozwiązany za pomocą modyfikacji ustawień serwera WWW, pozwalających na skrócenie czasu reakcji.
7
Content available Web server latency reduction study
Mbarek F., Mosorov V., Wojciechowski R.
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
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2017
|
T. 7, nr 3
51--55
EN
This paper investigates the characteristics of web server response delay in order to understand and analyze the optimisation techniques of reducing latency. The analysis of the latency behavior for multi-process Apache HTTP server with different thread count and various workloads, was made. It was indicated, that the insufficient number of threads used by the server handling the concurrent requests of clients, is responsible for increasing latency under various loads. The problem can be solved by using a modified web server configuration allowing to reduce the response time.
PL
W artykule opisano badania charakterystyk czasowych serwera WWW w celu zrozumienia i analizy technik optymalizacyjnych powodujących redukcję opóźnienia. Dokonano analizy czasów opóźnień dla wieloprocesowego serwera Apache dla różnej liczby wątków i obciążeń. Wskazano, że niewystarczająca liczba wątków wykorzystywanych przez serwer, obsługujących jednoczesne żądania klientów, wpływa znacząco na zwiększenie opóźnień dla różnych obciążeń. Problem może być rozwiązany za pomocą modyfikacji ustawień serwera WWW, pozwalających na skrócenie czasu reakcji.
8
Content available remote Prediction of woven fabric properties using software ProTkaTex
Kolčavová-Sirková B., Mertová I.
Autex Research Journal
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2013
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Vol. 13, no. 1
11---16
EN
Fabric properties and fabric structure prediction are important in each industry domain. Generally all professional CAD packages for woven textiles system will be able to achieve basic fabric simulation and production output. A good CAD system should enable you to create design (dobby and jacquard woven fabric) ideas quickly and easily to enhance the way you work. The differences among competing systems fall mainly into the following categories: ease of use; speed of operation; flexibility of operation; advanced features; technical support; and ongoing software development. Computer simulation or prediction is oriented on standard woven fabrics, technical textiles, and composites. This article focuses on the presentation of software ProTkaTex and its use in the prediction of woven fabric properties. The software implements a generalized description of the internal structure of woven fabric on the unit cell level, integrated with mathematical models of the fabric relaxed state. User can calculate selected mechanical and end-use properties of dobby and jacquard woven fabric as well as can evaluate fabric behavior before real weaving. The major challenge is to develop software that industry will use in design centers for creation and development of new fabric structures for technical as well as clothing application.
9
Eksploatacyjne i technologiczne aspekty wibracyjnego zagęszczania wątków. Cz. II
Kuchar M., Słodowy J.
Przegląd Włókienniczy - Włókno, Odzież, Skóra
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2011
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nr 5
23-25
EN
In this paper we present the results of redearches into vibration thicken the weft during the dens fabric production. The vibration biting up process has been compared with classical one (using rigid reed). The dynamic load on the warp by vibrating and flexible reed has been evaluated in this paper. The structural changes of fabric were studying to evaluate the effects of decreased density of cloth. The changes of itrathread density of fibers as well as increasing of numbers of threads in the fabric were founf.
10
Eksploatacyjne i technologiczne aspekty wibracyjnego zagęszczania wątków. Cz. I
Kuchar M., Słodowy J.
Przegląd Włókienniczy - Włókno, Odzież, Skóra
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2011
|
nr 4
26-28
EN
Textile products containing polymer coatings are used in clothing protecting against unfavorable weather conditions - rain, snow. For these products tests results of changes in their barrier properties - waterproofness under such conditions simulating clothing utilization as dynamic squeezing, flexing as well as maintenance process - washing, were presented.
11
Content available Metoda tworzenia nowych bezsplotowych struktur tekstylnych
Kuchar M., Podsiedlik W., Słodowy J., Wiśniewski M.
Problemy Eksploatacji
|
2011
|
nr 4
195-206
PL
Przedstawiono realizację idei nowego systemu wytwarzania płaskich bezsplotowych wyrobów włókienniczych przy ciągłym ruchu organów wyko-nawczych urządzenia wytwórczego - bez tworzenia przesmyku. Brak splotu wyrobu tekstylnego uzyskano przez zaplatanie nitki wątkowej (rowingu szklanego z powłoką PCV) na wynoszonych lokalnie kołkach na obwodzie bębna pobierającego z ramy natykowej nitki osnowowe (takie same jak nitka wątkowa) i dociskanie nimi przez opasanie wątku do powierzchni bębna. Przewidziano konsolidację termiczną wyrobu płaskiego w postaci siatki budowlanej. Dla uzyskania postępu zaplatania rowingu wątkowego zaplanowano wysuwanie po jednej stronie bębna pojedynczego kołka, a po drugiej - dwóch jednocześnie. Jako mechanizm wodzący wątek przewidziano przekładnię cięgnową o stałej prędkości obwodowej z wodzikiem przymocowanym do cięgna. Wykonano projekt stanowiska badawczego do tworzenia bezsplotowych wyrobów płaskich składającego się z posadowionych na ramie następujących zespołów: - bębna z układem napędowym, - zespołu wodzenia nitki wątkowej, - zespołu odbioru wyrobu, - dwóch kulowych popychaczy obrotowych. Kulowe popychacze obrotowe realizują ruchy wynoszenia kołków, a napęd otrzymują od bębna - poprzez zazębienie kulek z wgłębieniami w czołach wysuwanych kołków. Zgłoszenie patentowe tego wynalazku (nr P.394865) zostało zarejestrowane w Urzędzie Patentowym RP. Wykonano część mechaniczną stanowiska badawczego oraz zbudowano na bazie sterowników PLC i falowników prądowych układy sterowania. Badania wytwarzania tekstylnych wyrobów bezsplotowych przeprowadzono wg planu ujmującego 2 rodzaje rowingu w osłonie PCV, prędkość obwodową bębna do 1,5 m/min, napięcie nitek do 80 N i temperatury podczas procesu zgrzewania do 600°C. Określono optymalne dla stanowiska badawczego parametry procesu wytwórczego. Uzyskany płaski bezsplotowy wyrób włókienniczy poddano ocenie geometrycznej (regularności podziałki siatki) i wytrzymałościowej. Stwierdzono pozytywne własności wytworzonego wyrobu bezsplotowego, wysoką wytrzymałość na rozrywanie i bardzo mały rozrzut wyników, co świadczy o dobrej powtarzalności procesu technologicznego.
EN
As the aim of work the realisation of the system of producing the new weaveless textile fabrics with the continuous movements of the generating elements of machine without forming the shed has been set. The performed actions involved: - Designing the test rig for production of the weaveless textile structures, - Production and verification of the test rig producing the weaveless textile structures, - Tests of the technological parameters for the producing the weaveless flat textile fabrics, - Identification of properties of the produced weaveless textile structures. The weaveless structure of the textile fabric has been made through wrapping the weft (the PCV covered glass roving) around the locally shifted pins that are assembled in the rings on sides of the drum, which takes out the warp threads (also the PCV covered glass rovings) from creel that press the weft thread to the surface of the drum. The weft and warp threads have been consolidated thermally to the fabric - a building grid. In order to achieve the progress in wrapping the weft thread its wrapping has been made on a single pin shifted on the one side of the drum and two pins moved on the opposite side. As a mechanism carrying the weft thread a roller chain transmission with a constant circumferential velocity, which has benn provided with a feeder, has been utilised. The design of a test rig for producing the weaveless textile fabrics has been made. The test rig consists of the following assemblies with their load-carrying structure: - Drum with is driving unit, - Weft feeding set with its driving unit, - Take-up set of the fabric, - Two ball rotating actuators. The ball rotating actuators realize the pins shifting. They are driven from the rotating drum - through their meshing with holes in pins. The patent application for this invention has been registered in the Patent Office of the Republic of Poland (No P.394865). The creel with its load-carrying structure with ball bearing systems and friction brakes has been designed. The test rig for the weaveless fabrics and creel have been produced in the Department of Textile Techniques of the Institute for Sustainable Techologies - National Research Institute. The control systems of the test device have been developed with usage of the PLC systems that govern: - The setting of the velocities of the drum and the feeder and synchronise the mutual position of these components, - The conditions of the thermal consolidation of the fabric. The test rig for generating the weaveless structures has been verified in the series of tests. A number of the design changes were introduced and as a result the proper action of thee rig has been achieved. The tests of the producing the weaveless textile fabrics have been performed according to the research plan involving 2 types of the PCV coated glass roving, the circumferential velocity of the main drum up to 1.5 m/min, tension of the threads up to 80 N and temperature of the thermal consolidation up to 600°C. The optimum parameters of the production process have been determined. The weaveless textile fabric has been tested for its geometric features (regularity of the grid) and its straight (tension tests) The good properties of the new fabric have been confirmed and very limited scatter of the test results has been shown, which demonstrates the good repatibilty of the production process.
12
Content available remote Automatic Inspection of Woven Fabric Density of Solid Colour Fabric Density by the Hough Transform
Pan R., Gao W., Liu J., Wang H.
Fibres & Textiles in Eastern Europe
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2010
|
Vol. 18, no. 4 (81)
46--51
EN
When analysing the colourcolours in woven fabrics images, the fabrics are suggested to be divided into three categories: solid colour fabrics, single-system-mélange colour fabrics and double-system-mélange colour fabrics. Corresponding to the classification, the inspection of woven fabric density can be also divided into three stages. A method of inspecting the density of solid colourcolour fabrics is discussed in detail in this study. The Hough transform is used to detect the skew angles of warp and weft yarns, and then the pixels in the fabric image are projected along the skew-direction. Warp and weft yarns can be segmented successfully by locating the true minimum values which indicate the interstices between the yarns. The density of solid colourcolour fabric can be inspected by counting the yarns in a unit length in the fabric image.
PL
Analizę kolorów w obrazach tkanin można podzielić na trzy kategorie: tkaniny jednobarwne oraz z jedno i dwu systemowego melanżu. Artykuł odnosi się do przypadku pierwszego. Do analizy obrazu zastosowano transformatę Hough’a. Położenie przędz osnowowych i wątkowych jest scharakteryzowane przez rzeczywiste odległości między nitkami oraz ilość nitek przypadających na jednostkę długości.
13
Content available remote Identifying the cause of destruction of textile linear structures
Słodowy J., Rutkowska A.
Autex Research Journal
|
2004
|
Vol. 4, no. 3
129--136
EN
The article presents investigations into the mechanism of continuity loss of textile linear products. A method and tools for implementing it have been developed with the aim of investigating loose textile products, and determining the causes of their destruction. Special emphasis is placed on the usability of the procedure we accepted for investigating the resistance of the product's structure to the action of an aerodynamic force which occurs during the transport of weft with a weak structure. Two mechanisms of yarn breakage, especially that of loose wefts, have been differentiated. The first consists in breaking fibres which form the yarn, and the second in mutual slippage of fibres. Both mechanisms can be determined by analysing the force-elongation curves over yarn stretching in both static and dynamic conditions. The influence of an air stream acting longitudinally to the yarn, its velocity and time of action were also determined, with the aim of recognising the conditions of pneumatic weft transport.
14
Dynamiczne kryterium przydatności nitki wątku do tkania
Suszek H.
Przegląd Włókienniczy + Technik Włókienniczy
|
2001
|
nr 10
19-21
15
Generowanie impulsów napięciowych w wątku na krosnach bezczółenkowych
Suszek H.
Przegląd Włókienniczy + Technik Włókienniczy
|
2000
|
nr 8
18-20
16
Identyfikacja napięcia wątku w krośnie chwytakowym
Suszek H.
Przegląd Włókienniczy + Technik Włókienniczy
|
1998
|
nr 11
15-16
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